package cn.tac.test.mybatis.typehandler;

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedJdbcTypes;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @author : tac
 * @since : 04/09/2017
 */
@MappedJdbcTypes(JdbcType.VARCHAR)  //这个handler会覆盖掉原有的VARCHAR对应的Integer类型的handler
public class MyVarchar2IntegerTypeHandler extends BaseTypeHandler<Integer> {
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, Integer parameter, JdbcType jdbcType) throws SQLException {
        ps.setString(i, parameter.toString());
    }

    @Override
    public Integer getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return wrapStr(rs.getString(columnName));
    }

    @Override
    public Integer getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return wrapStr(rs.getString(columnIndex));
    }

    @Override
    public Integer getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return wrapStr(cs.getString(columnIndex));
    }

    private Integer wrapStr(String str) throws SQLException {
        return Integer.parseInt(str) + 1;
    }
}
